Bearing puller



Sept. 4, 1928.

BEARING. FULLER I Filed April 21, 1927 2 sheets-sheet 1 INVENTOR 7A/VES'Pif- HOIYFZZ y .1,683,188 J. W. HOWELL I mvENToR @Hasn/10mm ATTORNEYS '3Patented Sept. 4, 1928.

UNITED STATES AMES W. HOWELL, OF CLEVELAND, OIIO, ASSIGNO1Ft TO THEW'HITE MOTOR VCOM-` 1,888,188 Pfr-Aralar erstes.

PANY, OF CLEVELAND, OHIO, CORPORATION OHlO.

BEARING FULLER.

Application iiled April 21, 192:7. Scral'No. 185,459.

This invention relates to a tool for gripping and longitudinallyextracting objects from supports to vwhich they may be secured, and isparticularly applicable to the removal of wheels, gears, bearings andthe like, which have been applied to shafts or axles.

Heretofore many devices have been provided for removing or extractingarticles from their mountings, the more common forms of which eithercomprise a threaded cap which may be attached to a gear or wheel andwhich carries a screw for exerting pressure on the end of the shaft, orcomprise a screw for abutting the end of the shaft and carrying a nutprovided with pivoted hoo is for engagement with the wheel or gear.

While devices of these types are capable of exerting a powerful pullingaction between the part being removed and the shaft, they are not"adapted to handling a variety of sizes of the work, are inclined torelease or slip off the object at inopportune times, and can not beconveniently used in limited spaces or where fthe part to be removed issituated closely to other parts on the shaft orfaxle. 8

By applications of my invention, these and other difficulties areovercome. l.

The invention will be better understood from the description of onepractical. embodiment thereof, illustrated in the accompanying drawing,in which Fig. l is al side elevation of one form of apparatus embodyingthe invention,

Fig. 2 is a cross sectional view taken' on the line II--II of Figure l,

Fig. 3 is a central longitudinal section of the tool shown in Fig. l, i

Fig. 4t is a perspective view of one of the engaging hooks or arms,

Fig. 5 is a view similar to Fig. l but illustrating the use of a tool inremoving the inner race of one of two closely situated roller bearings,

Fig. 6 is a cross sectional view taken on line VI-VI of Figure 5,

Fig. 7 is a longitudinal sectional View of parts used to engage thebearing race taken on line VII-VII of Fig. 6,

Fig.8 is a perspective view of these parts, in unassembled relation, and

Fig. 9 is a fragmentary view similar to` Figs. l and 5, but showing thetool engaging a bearing of small diameter.

' Referring iirst to Figuresl l to t inclusive,

the tool comprises a screw l adaptedl to engage the end of a shaft oraxle 2 and provided with a head 3 for engagement with a wrench bywhichit may be rotated. VThe screw is threaded through a cap or nut 4 carriedupon the end of a tubular extension shown as a tube 5, the'other end ofthe tube being secured to a hollow spider or hub 6 which carries thegripping mechanism for engaging the bearing, gear, or the like, which isto be removed from its shaft or axle` the tube and hub constituting aframe fori the tool. l

The hub 6 consists of a Vhollow cylindrical central section or body 6a,provided on its exterior with longitudinally extending ribs 6, shownfour innumber. Each rib has Aa transversely extending aperture adjacentcach end thereof, and a pin 7 extends through each aperture. Pairs oflinks 8V are pivoted upon the ends of pins 7 adjacent the sides of theribs, and carry pivoted between their outer ends upon pins 9, grippingarms l0. The links are all ofthe same length-and the distance betweenapertures in the ribs and work between -the maximum', which is thatLaccommodated when the links 8 extend normally to the longitudinal axisof the tool, and the minimum, which isv determined by the armscontacting with the ribs, by simply moving the arms longitudinally ofthe tube. The-angle at which the hooked ends of the arms contact anobject docs not vary and consequently there is no more tendency for thehooks to slide ofi objects of one diameter more than those of another.Moreover it will be noted that any pressure exerted by the screw l tendsto further draw in the arms by closingthe parallelograms formed by thearms and links. and so causes the arm to grip the object with a pressurewhich increases as the pressure exerted by the screw is increased. thusfirmly holding the object and precluding any possibility of the toolslipping ofi'.

l In Figures 5 to 8, the tool shown in Figfao.

` and 13.

bearing.

ures 1 to 4 is illustrated as used toV remove one ol` two bearing raceswhich are so olosely situated upon the shaft 102that the hooks V12 areobstructed and prevented frein engaging'the race itself. To transmit theforce of `the tool to the race 13, use is made of the rings best shownin Figure 8, which oomprise a divided inner ring consisting of halveslet and 14 and a continuous outer ring 15. best illustrated in Figures 6and 7,"fro1n which it will be seen that the halves of the inner ring areplaced about the shaft vso that the inwardly extending flange .111 isV`the:` screw. The hooksV 12 of arms 10 are caused tof gripthe ring 15and to transmit through it and the inner ring halves 14 and 14, to theinner surface of bearingrace 13,

Vthe pressure exerted upon actuation ofthe screw l. I

In Figure `9, the tool is shown engaging the, outer race 113' with avery small ball the same manner` asitA engages the larger one ofFiguresl to14 or the ring of Figures 5 to 8, the parallelograms formedby the arms and links being greatlyflattened.

lfVhile` I have described the illustrated embodiment of my invention insome particularity, thisV embodiment is shown by Way of A illustrationonly and not by Way of limitation and I do not limit myself to thedetails shown alfiddescribed but claim as my invention all embodimentsthereof` coming within the scopeV of the appended claims.

Iclaim:`

1. A tool comprising la screw, a nut threaded thereon, altubular carriercarried by said nut, there being a pluralityV of longitudinallyextendingribs upon the exterior of said carrier, two pivots extendingtrans- 'Ihe application of these rings is Itv engages this,r bearingrace in' 'threaded through said nut.

versely through each rib, links of equal i length carried onreaehend ofeach pivot, a gripping arm carrying tWo pivots similarly spaced ktothose on each rib, the ,pivots ofvone gripping arm"b'eing' clarried bythe outer ,endsv of the links on one rib, whereby the gripping arms`remain always parallel to the axis of the tool. 'Y

2. `The combination With ,a pulling tool including a screw, a nut, 'andgripping means,` of a split `ring having an inwardly extending liangeadapted to engage parts to be removed, and aeontinuous ring fitting theexteriorofthe s lit ringand adapted to hold the parts `togetli tudinal`f pressure thereto `from the gripping means." Y 1117,., ,y

- 3. A tool comprising longitudinal pres-V sure exerting means, grippingmeans carried er and transmit longi-,

thereby, a split ring having 2in-inwardly ex-vtending flange adapted toengage parts to be removed., and a continuous4 ring fitting the exteriorof the split ring andmadaptedto hold the parts togetherand--transmitflongitudinal `pressure ytheretofljom the gripping.,

means.` y Y. Y c

4. A tool` comprismg a tubularbody, a plurality of gripping armsconnected thereto` by parallel. link mechanisms, a tubular extensionextending from fthe body in a di-il rection away from the grippingends-of said arms, and longitudinal `pressure exerting means at the endot'said extenslon.

5. ,A `tool comprising a tubular body, a

to by parallel link mechanisms, a`tube-havattached to the other end ofsaid tube, and a longitudinal'` pressure exerting ,y screw 'plurality ofgripping-arms connected there-s,.-

6;` A tool comprising y a .hollowv frame 'l adapted to receive theend'of an axle or the for exerting longitudinalpressure upon said ilike, means at'one end ofsaid hollow frame axle, and radially movablegripping means,

at theother end of said sectionfor engaging 'an article? secured' tosaid axle. In testimony whereof* I hereunto. affix, my

signature this` 18 day of April, 1927.`

JAMn-s WQ, noufnLL.4

